<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button id="btn1">打开</button>
    <button id="btn2">关闭</button>
    <script>    
        btn1.onclick = function(){
            //打开一个新的选项卡,打开的地址为baidu
            window.open("http://www.baidu.com")
        }
        btn2.onclick = function(){
            window.close();
        }
    </script>
</body>
</html>